Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
Only one, a bell-like craft, seems to have crashed, or so the story (assembled by an Italian ufologist in 2000) goes.
Source: https://www.spectator.com.au/2023/08/aliens-probably-exist-but-they-havent-visited-us/